Sea Temperature in Yffiniac in September

Complete information on the sea temperature range in the Bay of Biscay in Yffiniac in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Yffiniac. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Water Temperature Range in Yffiniac in September

16°C

MINIMUN

18.5°C

AVERAGE

21°C

MAXIMUM

Historical Data of Water Temperature in September in Yffiniac

Water Temperature Chart for Bay of Biscay in Yffiniac in September

Sea Temperature Table in Yffiniac in September Over the Past Years

Day	2024	2023	2022	Average
Sep 1	18°C	18°C	19°C	18.3°C
Sep 2	18°C	17°C	19°C	18.3°C
Sep 3	18°C	20°C	17°C	18.5°C
Sep 4	18°C	19°C	17°C	18.3°C
Sep 5	18°C	17°C	17°C	17.8°C
Sep 6	19°C	19°C	18°C	18.5°C
Sep 7	18°C	18°C	17°C	18.0°C
Sep 8	19°C	20°C	19°C	19.0°C
Sep 9	19°C	20°C	20°C	19.5°C
Sep 10	18°C	18°C	20°C	18.8°C
Sep 11	18°C	17°C	18°C	18.0°C
Sep 12	19°C	18°C	19°C	18.5°C
Sep 13	19°C	18°C	18°C	18.3°C
Sep 14	17°C	18°C	20°C	18.3°C
Sep 15	18°C	18°C	17°C	17.8°C
Sep 16	18°C	19°C	20°C	18.8°C
Sep 17	18°C	19°C	17°C	17.8°C
Sep 18	19°C	18°C	20°C	18.5°C
Sep 19	18°C	19°C	20°C	18.5°C
Sep 20	18°C	19°C	17°C	17.8°C
Sep 21	18°C	17°C	18°C	17.5°C
Sep 22	18°C	17°C	19°C	17.8°C
Sep 23	18°C	20°C	17°C	18.3°C
Sep 24	18°C	18°C	19°C	18.3°C
Sep 25	18°C	18°C	17°C	17.8°C
Sep 26	18°C	18°C	19°C	18.3°C
Sep 27	18°C	17°C	19°C	18.0°C
Sep 28	18°C	19°C	19°C	18.3°C
Sep 29	18°C	17°C	19°C	17.8°C

Yffiniac Climate and Swimming Opportunities in September

20°C

Average Day Air Temperature

13°C

Average Night Air Temperature

55 mm

Precipitation Amount per Month

10 days

Number of Rainy Days

12 hrs

Daylight
per Day

6 hrs

Sunshine
per Day

19 km/h

Average Wind Speed

80%

Average
humidity

Yffiniac lies within the Brittany in France. The average daytime temperature in Yffiniac in September is 20°C (67°F), while the nighttime average is 13°C (55°F). There are typically 10 rainy days during the month, with a total precipitation of 55 mm (2.1 inches). The daylight duration in September in Yffiniac is 12 hours, with an average of 6 hours of sunshine per day. The average wind speed in September is 19 km/h (12 mph), and the humidity level is around 80%.

The water temperature in Yffiniac in September ranges from 17°C to 19°C (63°F to 66°F). At the beginning of the month, the average temperature is around 18°C (64°F), shifting to 18°C (64°F) by mid-September and reaching 18°C (64°F) in the last ten days. Overall, the average sea temperature in Yffiniac for September is 18°C (64°F). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Sea Temperature in September in Nearby Cities

Frequently Asked Questions About Water Temperatures in September in Yffiniac

What is the sea temperature in Yffiniac in September?

The water temperature in the Bay of Biscay in Yffiniac in September ranges from 17°C to 19°C (63°F to 66°F).

Is it possible to swim in the Bay of Biscay in Yffiniac in September?

The average sea temperature in Yffiniac in September is 18°C (64°F), and the air temperature is 20°C (67°F), so ideal conditions for a refreshing swim, though some may still find it a bit cool.